Share

IIR document

Optimizing the compression/absorption heat pump system at high temperatures.

Number: pap. n. 237

Author(s) : BERGLAND M., EIKEVIK T. M., TOLSTOREBROV I.

Summary

Two separate simulation models were developed comprising a two-stage compression-absorption heat pumps (CAHP) system and an ammonia-water absorber model. The two-stage CAHP system was simulated at four different compressor discharge temperature limitations: 150, 175, 200 and 250°C. The absorber model was used for comparison of five different compact heat exchangers for heating air in a cross-flow. The two-stage process showed the benefits of the desuperheater. Maximum supply temperatures were obtained at 171.8°C with a COP of 2.08, when the maximum discharge temperature was set to 250°C. Simulations from the absorber model yielded air mass flow rate up to 20 times larger than the ammonia-water mixture. The heat exchange between the air and the mixture was sensitive to the absorber height and the mass flow rate of air, which resulted in large fan work up to 162 kW. Finned flat tube heat exchangers showed best results with respect to the absorber height and fan work of 2.5 m and 8.7 kW.

Available documents

Format PDF

Pages: 8 p.

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Optimizing the compression/absorption heat pump system at high temperatures.
  • Record ID : 30015945
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0237

Links


See other articles from the proceedings (657)
See the conference proceedings

Indexing